I have ~15 remote locations with subnets similar to the following:
All locations would be connecting back to location A.
Currently we're bridging a single subnet between locations for voice, and other networks are not routed. I'd like to change that to something like the above, and do away with the bridging. Is something like IPSec + OSPF over GRE or IPIP the best way to go? Looking for as little overhead as possible with some amount of security.
Second question is less relevant to this forum, but is there a good way to automate deployment of this?